“ As it appear that nobody in Canada has ever experience these temperatures before , there was a lot to observe and learn , ” say Gary Neels , Director of Growing and Research at Canadian perennial disseminator Qualitree . The company has been using a microfog installing and according to Gary , the use of fog has been extraordinarily usefull . “ We have been focusing on shifting to using VPD / Fog solely as our master method of plant generation . While some season are better than others for this method , it has proven very well . ”
The MJ - Tech MPU-36/04 social unit
Crop damaging amountsA temperature of 50 degrees might not derive as a surprise for North American agriculturist , but only when you talk about Fahrenheit . These weeks the temperature in Lytton , Canada climb to a stunning 49.6 degree Celsius . It ’s a new disc , but more importantly , it ’s also a trend . “ Whereas averages suggest the temperature remains minor , the recent years show weather patterns in June - September with multiple geological period that temperature attain over 30 degrees Celsius , ” aver Jurnjan Bremer with MJ - Tech . With its in high spirits - pressure fogging system , the company has helped many Northern American growers deal with gamy temperatures .
Among them is also Qualitree , an innovative propagation nursery , and glasshouse operation . turn up on the outskirts of Chilliwack , they saw the temperature rise , and rear , and rise . Fortunately , they instal a gamey pressure fog social unit .
“ Without having this fog social unit , temperature would have soared to crop - damage measure , ” says Gary Neels , Director of Growing and Research . He say the company has been pore on shifting to using VPD / Fog solely as our primary method of plant propagation , as the fog has been inordinately useful to them , particularly during the late extreme point . “ While some seasons are upright than others for this method acting , it has proven very well . Whether it was using for extension or stringently evaporative chilling , the system essay to keep things in balk well than holding under plastic . ”
He sees that in sections where there was some credit card being used due to some crop timing issues , the fogginess kept the plastic cool and the temperature underneath unchanging , without oversaturating the industrial plant .
The extra source of humidness safeguards the greenhouse not to go past a certain critical temperature . “ As the fog evaporates into the melody , particle change from a liquidness to a gas and with that heating is removed ( adiabatic cool down rationale ) . You want to strike down strain temperature as much as possible without to over wet the status , ” Jurnjan excuse . “ If high level of humidity ( > 90 % ) are attain , the cool down power slows down . By atmosphere central and bringing in ‘ Fresh ’ aviation to replace the ‘ high humidity used ’ melodic phrase , the process of cooling can be continue unabated and efficiently . ”
equilibrise atmosphere exchangeBalancing air exchange is critical to this procedure . “ In combination with a innovative climate control system the ventilation system and humidness can be balanced out . ” The MJ - technical school resolution , via API interfaces , are compatible with all climate ascendancy organisation providers ( Priva , Hoogendoorn , Ridder - Hortimax , others ) .
“ At these extreme times , we did see a small amount of radioactive dust due to very big fogging , but it was minimal in comparison to what could have take place , ” Gary aver . “ Also , with plant that are rooted and develop on , the use of evaporative chilling has demonstrate substantial growing and harvest health overall . “
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He adds that as it appears that nobody in Canada has ever experience these temperatures before , there was a great deal to follow and learn . “ Since we are using the VPD organisation , balancing the surround is a improbable labor . The vents need to open to let out the oestrus , but we also call for to hold the humidness in the greenhouse bays . We had to apply a compounding of energy curtains and shade screens to achieve this , while also regulating the temperatures . ”
Some bays needed to stay completely closed ( tone / energy mantle ) as they had tens of thousands of stuck URC ’s , while others just needed a bit of daze to keep the temperatures order . “ In the graph above , there is a second where we see temperatures hit 40c without any fog . Once activated ( see unripe circle ) the temperature takes a significant prima donna and makes enter the nursery section bearable . ”
easily recoveryAlso , after the heatwave , Jurnjan says the personal effects of the fogging will persist visible , as the convalescence of the plants will be much better due to a more enjoyable mood . “ During the solar day when the plant is transpiring it will use up internal reserves in the stem and other parts of the plant , when the radiation ( and body process ) is break down , the plants should restore those reserves and transport the sugars and elements . However , when the RH stays low , too late the plant life has trouble refilling its internal reserves . It could be rede to try and build up some humidness in the beginning in the afternoon , either by close up the windows more or fogging which is easier in such uttermost climate . Due to the difference in VPD , the plant life will live importantly less stress . ” Also , due to the remotion of extremely miserable humidity and high temperature , some processes will have higher efficiency . “ mostly , it results in fewer personnel casualty and more product . ”
For Qualitree , the high - insistence fog system has proven its economic value . “ It has prove efficient and authentic whenever we decide to use this tool , so much so that we have decide to move ahead with commissioning more units for the rest of our recent physique , and the succeeding greenhouse space . With the effects of mood change becoming more apparent , we can say that this tool is imperative to keep our crops not only animated but also in ideal growing conditions . “
For more information :
Jurnjan BremerMJ - TechNieuwe Donk 54879 AC Etten - LeurNetherlandsTel . : +31 ( 0)76 597 45 03[email protected]www.mjtech.nl
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